<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.9.5"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>VectSharp: VectSharp.Raster.ImageSharp/GradientBrushApplicator.cs Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="Doxy.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr id="projectrow">
  <td id="projectlogo"><img alt="Logo" src="icon.svg"/></td>
  <td id="projectalign">
   <div id="projectname">VectSharp<span id="projectnumber">&#160;2.6.1</span>
   </div>
   <div id="projectbrief">A light library for C# vector graphics</div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.5 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
var searchBox = new SearchBox("searchBox", "search/",'.html');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function() {
  initMenu('',true,false,'search.php','Search');
  $(document).ready(function() { init_search(); });
});
/* @license-end */
</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
  <div id="nav-tree">
    <div id="nav-tree-contents">
      <div id="nav-sync" class="sync"></div>
    </div>
  </div>
  <div id="splitbar" style="-moz-user-select:none;" 
       class="ui-resizable-handle">
  </div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(document).ready(function(){initNavTree('_gradient_brush_applicator_8cs_source.html',''); initResizable(); });
/* @license-end */
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<div id="MSearchResults">
<div class="SRPage">
<div id="SRIndex">
<div id="SRResults"></div>
<div class="SRStatus" id="Loading">Loading...</div>
<div class="SRStatus" id="Searching">Searching...</div>
<div class="SRStatus" id="NoMatches">No Matches</div>
</div>
</div>
</div>
</div>

<div class="header">
  <div class="headertitle"><div class="title">GradientBrushApplicator.cs</div></div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">    VectSharp - A light library for C# vector graphics.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">    Copyright (C) 2020-2022 Giorgio Bianchini</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"></span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment">    This program is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment">    it under the terms of the GNU Lesser General Public License as published by</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">    the Free Software Foundation, version 3.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment">    This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">    GNU Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"></span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">    You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">    along with this program. If not, see &lt;https://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment">*/</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="keyword">using </span>System;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="keyword">using </span>System.Buffers;</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="keyword">using </span>System.Numerics;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="keyword">using </span>SixLabors.ImageSharp.Memory;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="keyword">using </span>SixLabors.ImageSharp.PixelFormats;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="keyword">using </span>SixLabors.ImageSharp.Drawing.Processing;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="keyword">using </span>SixLabors.ImageSharp;</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="keyword">using </span>System.Reflection;</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"><a class="line" href="namespace_vect_sharp_1_1_raster_1_1_image_sharp.html">   27</a></span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespace_vect_sharp_1_1_raster_1_1_image_sharp.html">VectSharp.Raster.ImageSharp</a></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>{</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>    <span class="comment">// Adapted from https://github.com/SixLabors/ImageSharp.Drawing/blob/master/src/ImageSharp.Drawing/Processing/GradientBrush.cs - Why isn&#39;t this public? D:</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>    <span class="keyword">internal</span> <span class="keyword">abstract</span> <span class="keyword">class </span>GradientBrushApplicator&lt;TPixel&gt; : BrushApplicator&lt;TPixel&gt;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>             where TPixel : unmanaged, IPixel&lt;TPixel&gt;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>    {</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>        <span class="keyword">private</span> <span class="keyword">static</span> readonly TPixel Transparent = Color.Transparent.ToPixel&lt;TPixel&gt;();</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>        <span class="keyword">private</span> readonly ColorStop[] colorStops;</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>        <span class="keyword">private</span> readonly GradientRepetitionMode repetitionMode;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>        <span class="keyword">private</span> readonly MemoryAllocator allocator;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>        <span class="keyword">private</span> readonly <span class="keywordtype">int</span> scalineWidth;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>        <span class="keyword">private</span> readonly <span class="keywordtype">object</span> blenderBuffers;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>        <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>        <span class="keyword">private</span> PixelBlender&lt;TPixel&gt; _blender;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>        IMemoryOwner&lt;float&gt; amountBuffer;</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>        IMemoryOwner&lt;TPixel&gt; overlayBuffer;</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>        <span class="keyword">static</span> Type constructedLocalBlenderBuffersType;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>        <span class="keyword">static</span> GradientBrushApplicator()</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>        {</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>            Assembly utilities = Assembly.Load(<span class="stringliteral">&quot;SixLabors.ImageSharp.Drawing&quot;</span>);</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>            Type genericThreadLocalBlenderBuffersType = utilities.GetType(<span class="stringliteral">&quot;SixLabors.ImageSharp.Drawing.Utilities.ThreadLocalBlenderBuffers`1&quot;</span>, <span class="keyword">true</span>);</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>            Type[] typeArgs = <span class="keyword">new</span> Type[] { typeof(TPixel) };</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>            constructedLocalBlenderBuffersType = genericThreadLocalBlenderBuffersType.MakeGenericType(typeArgs);</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>        }</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="comment"></span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment">        /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment">        /// Initializes a new instance of the &lt;see cref=&quot;GradientBrushApplicator{TPixel}&quot;/&gt; class.</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment">        /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="comment">        /// &lt;param name=&quot;configuration&quot;&gt;The configuration instance to use when performing operations.&lt;/param&gt;</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="comment">        /// &lt;param name=&quot;options&quot;&gt;The graphics options.&lt;/param&gt;</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment">        /// &lt;param name=&quot;target&quot;&gt;The target image.&lt;/param&gt;</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="comment">        /// &lt;param name=&quot;colorStops&quot;&gt;An array of color stops sorted by their position.&lt;/param&gt;</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="comment">        /// &lt;param name=&quot;repetitionMode&quot;&gt;Defines if and how the gradient should be repeated.&lt;/param&gt;</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span><span class="comment"></span>        <span class="keyword">protected</span> GradientBrushApplicator(</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>            Configuration configuration,</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>            GraphicsOptions options,</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>            ImageFrame&lt;TPixel&gt; target,</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>            ColorStop[] colorStops,</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>            GradientRepetitionMode repetitionMode)</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>            : base(configuration, options, target)</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>        {</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>            <span class="comment">// TODO: requires colorStops to be sorted by position.</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>            <span class="comment">// Use Array.Sort with a custom comparer.</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>            this.colorStops = colorStops;</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>            this.repetitionMode = repetitionMode;</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>            this.scalineWidth = target.Width;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>            this.allocator = configuration.MemoryAllocator;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>            this.blenderBuffers = Activator.CreateInstance(constructedLocalBlenderBuffersType, <span class="keyword">new</span> <span class="keywordtype">object</span>[] { this.allocator, this.scalineWidth, <span class="keyword">false</span> });</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>            this._blender = (PixelBlender&lt;TPixel&gt;)this.GetType().GetProperty(<span class="stringliteral">&quot;Blender&quot;</span>, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetProperty).GetValue(<span class="keyword">this</span>);</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>            <span class="keywordtype">object</span> data = this.blenderBuffers.GetType().GetField(<span class="stringliteral">&quot;data&quot;</span>, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetField).GetValue(this.blenderBuffers);</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>            <span class="keywordtype">object</span> bufferOwner = data.GetType().GetProperty(<span class="stringliteral">&quot;Value&quot;</span>, BindingFlags.Instance | BindingFlags.Public | BindingFlags.GetProperty).GetValue(data);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>            amountBuffer = (IMemoryOwner&lt;float&gt;)bufferOwner.GetType().GetField(<span class="stringliteral">&quot;amountBuffer&quot;</span>, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetField).GetValue(bufferOwner);</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>            overlayBuffer = (IMemoryOwner&lt;TPixel&gt;)bufferOwner.GetType().GetField(<span class="stringliteral">&quot;overlayBuffer&quot;</span>, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetField).GetValue(bufferOwner);</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>        }</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span> </div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>        <span class="keyword">internal</span> TPixel <span class="keyword">this</span>[<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y]</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>        {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>            <span class="keyword">get</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>            {</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>                <span class="keywordtype">float</span> positionOnCompleteGradient = this.PositionOnGradient(x + 0.5f, y + 0.5f);</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>                <span class="keywordflow">switch</span> (this.repetitionMode)</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>                {</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>                    <span class="keywordflow">case</span> GradientRepetitionMode.None:</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>                        <span class="comment">// do nothing. The following could be done, but is not necessary:</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>                        <span class="comment">// onLocalGradient = Math.Min(0, Math.Max(1, onLocalGradient));</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>                        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>                    <span class="keywordflow">case</span> GradientRepetitionMode.Repeat:</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>                        positionOnCompleteGradient %= 1;</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>                        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>                    <span class="keywordflow">case</span> GradientRepetitionMode.Reflect:</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>                        positionOnCompleteGradient %= 2;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>                        <span class="keywordflow">if</span> (positionOnCompleteGradient &gt; 1)</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>                        {</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>                            positionOnCompleteGradient = 2 - positionOnCompleteGradient;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>                        }</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>                        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>                    <span class="keywordflow">case</span> GradientRepetitionMode.DontFill:</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>                        <span class="keywordflow">if</span> (positionOnCompleteGradient &gt; 1 || positionOnCompleteGradient &lt; 0)</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>                        {</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>                            <span class="keywordflow">return</span> Transparent;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>                        }</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span> </div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>                        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>                    <span class="keywordflow">default</span>:</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>                        <span class="keywordflow">throw</span> <span class="keyword">new</span> ArgumentOutOfRangeException();</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>                }</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>                (ColorStop from, ColorStop to) = this.GetGradientSegment(positionOnCompleteGradient);</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>                <span class="keywordflow">if</span> (from.Color.Equals(to.Color))</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>                {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>                    <span class="keywordflow">return</span> from.Color.ToPixel&lt;TPixel&gt;();</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>                }</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>                <span class="keywordtype">float</span> onLocalGradient = (positionOnCompleteGradient - from.Ratio) / (to.Ratio - from.Ratio);</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>                <span class="keywordflow">return</span> <span class="keyword">new</span> Color(Vector4.Lerp((Vector4)from.Color, (Vector4)to.Color, onLocalGradient)).ToPixel&lt;TPixel&gt;();</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>            }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>        }</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span><span class="comment"></span> </div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span><span class="comment">        /// &lt;inheritdoc /&gt;</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span><span class="comment"></span>        <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Apply(Span&lt;float&gt; scanline, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>        {</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>            Span&lt;float&gt; amounts = amountBuffer.Memory.Span.Slice(0, scanline.Length);</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>            Span&lt;TPixel&gt; overlays = overlayBuffer.Memory.Span.Slice(0, scanline.Length);</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>            </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>            <span class="keywordtype">float</span> blendPercentage = this.Options.BlendPercentage;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span> </div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>            <span class="comment">// TODO: Remove bounds checks.</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>            <span class="keywordflow">if</span> (blendPercentage &lt; 1)</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>            {</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>                <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; scanline.Length; i++)</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>                {</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>                    amounts[i] = scanline[i] * blendPercentage;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>                    overlays[i] = <span class="keyword">this</span>[x + i, y];</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>                }</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>            }</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>            <span class="keywordflow">else</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>            {</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>                <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; scanline.Length; i++)</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>                {</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>                    amounts[i] = scanline[i];</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>                    overlays[i] = <span class="keyword">this</span>[x + i, y];</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>                }</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>            }</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span> </div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>            Span&lt;TPixel&gt; destinationRow = this.Target.PixelBuffer.DangerousGetRowSpan(y).Slice(x, scanline.Length);</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span> </div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>            this._blender.Blend(this.Configuration, destinationRow, destinationRow, overlays, amounts);</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>        }</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="comment"></span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span><span class="comment">        /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="comment">        /// Calculates the position on the gradient for a given point.</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="comment">        /// This method is abstract as it&#39;s content depends on the shape of the gradient.</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span><span class="comment">        /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span><span class="comment">        /// &lt;param name=&quot;x&quot;&gt;The x-coordinate of the point.&lt;/param&gt;</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">        /// &lt;param name=&quot;y&quot;&gt;The y-coordinate of the point.&lt;/param&gt;</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">        /// &lt;returns&gt;</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span><span class="comment">        /// The position the given point has on the gradient.</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span><span class="comment">        /// The position is not bound to the [0..1] interval.</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span><span class="comment">        /// Values outside of that interval may be treated differently,</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span><span class="comment">        /// e.g. for the &lt;see cref=&quot;GradientRepetitionMode&quot; /&gt; enum.</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span><span class="comment">        /// &lt;/returns&gt;</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span><span class="comment"></span>        <span class="keyword">protected</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> PositionOnGradient(<span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y);</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span><span class="comment"></span> </div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span><span class="comment">        /// &lt;inheritdoc/&gt;</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment"></span>        <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>        {</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>            <span class="keywordflow">if</span> (this.isDisposed)</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>            {</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>                <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>            }</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>            base.Dispose(disposing);</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span> </div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>            <span class="keywordflow">if</span> (disposing)</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>            {</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>                ((IDisposable)this.blenderBuffers).Dispose();</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>            }</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>            this.isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>        }</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span> </div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>        <span class="keyword">private</span> (ColorStop From, ColorStop To) GetGradientSegment(<span class="keywordtype">float</span> positionOnCompleteGradient)</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>        {</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>            ColorStop localGradientFrom = this.colorStops[0];</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>            ColorStop localGradientTo = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span> </div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>            <span class="comment">// TODO: ensure colorStops has at least 2 items (technically 1 would be okay, but that&#39;s no gradient)</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>            <span class="keywordflow">foreach</span> (ColorStop colorStop <span class="keywordflow">in</span> this.colorStops)</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>            {</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>                localGradientTo = colorStop;</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span> </div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>                <span class="keywordflow">if</span> (colorStop.Ratio &gt; positionOnCompleteGradient)</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>                {</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>                    <span class="comment">// we&#39;re done here, so break it!</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>                    <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>                }</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span> </div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>                localGradientFrom = localGradientTo;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>            }</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span> </div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>            <span class="keywordflow">return</span> (localGradientFrom, localGradientTo);</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>        }</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>    }</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>}</div>
<div class="ttc" id="anamespace_vect_sharp_1_1_raster_1_1_image_sharp_html"><div class="ttname"><a href="namespace_vect_sharp_1_1_raster_1_1_image_sharp.html">VectSharp.Raster.ImageSharp</a></div><div class="ttdef"><b>Definition:</b> <a href="_gradient_brush_applicator_8cs_source.html#l00027">GradientBrushApplicator.cs:28</a></div></div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
  <ul>
    <li class="navelem"><a class="el" href="dir_af6010fc7dbdae73bc46c345931cfdda.html">VectSharp.Raster.ImageSharp</a></li><li class="navelem"><b>GradientBrushApplicator.cs</b></li>
    <li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.5 </li>
  </ul>
</div>
</body>
</html>
